Accentuation of Dietary Amino Acid Deficiency by Raw Soybean Growth Inhibitor

Abstract

Summary

1. The presence of raw soybean protein in the chick diet was found to develop or accentuate a deficiency of tryptophan in the case of a chick diet marginal in this amino acid. 2. A diet deficient or marginal in arginine and methionine was rendered more acutely deficient when the soybean protein component was present as raw meal. 3. The effects of these accentuated deficiencies on growth were reversed by adding the specific amino acids involved or by heat destruction of the growth inhibitor. 4. These results are in agreement with previous results in the cases of methionine, lysine, arginine and isoleucine.